diff --git a/.ruby-version b/.ruby-version
index 73462a5..ec1cf33 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.5.1
+2.6.3
diff --git a/.travis.yml b/.travis.yml
index dc37ee0..729cc50 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,4 +4,5 @@ rvm:
  - "2.3.7"
  - "2.4.4"
  - "2.5.1"
+ - "2.6.3"
 script: bundle exec rspec
diff --git a/Gemfile.lock b/Gemfile.lock
index bd15933..9882f9e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,35 +2,35 @@ PATH
   remote: .
   specs:
     rectify (0.13.0)
-      activemodel (>= 4.1.0)
-      activerecord (>= 4.1.0)
-      activesupport (>= 4.1.0)
+      activemodel (>= 5.2.3)
+      activerecord (>= 5.2.3)
+      activesupport (>= 5.2.3)
       virtus (~> 1.0.5)
-      wisper (>= 1.6.1)
+      wisper (~> 2.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    actionpack (5.2.1)
-      actionview (= 5.2.1)
-      activesupport (= 5.2.1)
+    actionpack (5.2.3)
+      actionview (= 5.2.3)
+      activesupport (= 5.2.3)
       rack (~> 2.0)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.1)
-      activesupport (= 5.2.1)
+    actionview (5.2.3)
+      activesupport (= 5.2.3)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activemodel (5.2.1)
-      activesupport (= 5.2.1)
-    activerecord (5.2.1)
-      activemodel (= 5.2.1)
-      activesupport (= 5.2.1)
+    activemodel (5.2.3)
+      activesupport (= 5.2.3)
+    activerecord (5.2.3)
+      activemodel (= 5.2.3)
+      activesupport (= 5.2.3)
       arel (>= 9.0)
-    activesupport (5.2.1)
+    activesupport (5.2.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
@@ -46,33 +46,33 @@ GEM
     coderay (1.1.2)
     coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.5)
     crass (1.0.4)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     diff-lcs (1.3)
     equalizer (0.0.11)
-    erubi (1.7.1)
-    i18n (1.1.1)
+    erubi (1.8.0)
+    i18n (1.6.0)
       concurrent-ruby (~> 1.0)
     ice_nine (0.11.2)
     jaro_winkler (1.5.1)
-    loofah (2.2.2)
+    loofah (2.2.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    method_source (0.9.0)
-    mini_portile2 (2.3.0)
+    method_source (0.9.2)
+    mini_portile2 (2.4.0)
     minitest (5.11.3)
-    nokogiri (1.8.5)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.10.3)
+      mini_portile2 (~> 2.4.0)
     parallel (1.12.1)
     parser (2.5.1.2)
       ast (~> 2.4.0)
     powerpack (0.1.2)
-    pry (0.11.3)
+    pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (2.0.5)
+    rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails-dom-testing (2.0.3)
@@ -123,9 +123,9 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  actionpack (>= 4.1.0)
-  awesome_print (~> 1.6)
-  pry (~> 0.11.3)
+  actionpack (>= 5.2.3)
+  awesome_print (~> 1.8)
+  pry (~> 0.12.2)
   rake
   rectify!
   rspec (~> 3.8)
@@ -135,4 +135,4 @@ DEPENDENCIES
   wisper-rspec
 
 BUNDLED WITH
-   1.16.2
+   1.17.2
diff --git a/rectify.gemspec b/rectify.gemspec
index 758c8c4..244c13e 100644
--- a/rectify.gemspec
+++ b/rectify.gemspec
@@ -12,15 +12,15 @@ Gem::Specification.new do |s|
   s.license       = "MIT"
   s.require_paths = ["lib"]
 
-  s.add_dependency "activemodel",   ">= 4.1.0"
-  s.add_dependency "activerecord",  ">= 4.1.0"
-  s.add_dependency "activesupport", ">= 4.1.0"
+  s.add_dependency "activemodel",   ">= 5.2.3"
+  s.add_dependency "activerecord",  ">= 5.2.3"
+  s.add_dependency "activesupport", ">= 5.2.3"
   s.add_dependency "virtus",        "~> 1.0.5"
-  s.add_dependency "wisper",        ">= 1.6.1"
+  s.add_dependency "wisper",        "~> 2.0"
 
-  s.add_development_dependency "actionpack",    ">= 4.1.0"
-  s.add_development_dependency "awesome_print", "~> 1.6"
-  s.add_development_dependency "pry",           "~> 0.11.3"
+  s.add_development_dependency "actionpack",    ">= 5.2.3"
+  s.add_development_dependency "awesome_print", "~> 1.8"
+  s.add_development_dependency "pry",           "~> 0.12.2"
   s.add_development_dependency "rake"
   s.add_development_dependency "rspec", "~> 3.8"
   s.add_development_dependency "rspec-collection_matchers", "~> 1.1"